Concrete-mixing apparatus.



P. C HAINS, s8. CONCRETE MIXING APPARATUS.

APPLIOATIDN FILED JUNE 15, 1911. 1,051,883 Patented Feb. 4, 1913.

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7 WITNESSES 7 I 1 [NI/ENTOR WZ/dw, M

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P. G. HAINS, S3.

CONCRETE MIXING APPABATUB.

APPLIOATIOH FILED JUHE'IB, 1911.

1,051,883. V Patented Feb. 4, 1913.

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' Attorney ch urging the ingredients the construction particularly UNITED STATES PATENT PETER C. HAINS, SB., OF WASHINGTON, DISTRICT OF COLUMBIA. ASSIGNQE; TO AUESG MATIQCONCRETE MIXER COMPANY, OF

NEW YORK, N. Y., A CORPORATEON.

CONCRETE-MIXING APPARATUS.

Specification of Letters Yatent.

Patented Feb. 4, 1913.

T 0 all whom it may concern:

Be it known that I, PETER G. lltnfss, 31:,

a citizen of the United States, residing; at

\Vashington, District of Columbia, have invented certain new and useful Improve ments in. Concreteullixing Apparatus, of which the following is a full, clear, and exact specification.

This invention relates to concrete mixing apparatus of the general type shown in Letters Patent No. (333,313, dated September 19, 1899; No. 722,782. dated March 17,1903 and No. 890,6etl, dated June 16, 1.908 wherein concrete is prepared or mixed in a suitable receptacle in such manner that by disot the mixture through a narrow aperture from the bottom of the receptacle the thorough mixing of the various materials will be effected with-- out the necessity of agitation by hand or by mechanical means, the complete commingling of the ingredients being effected i passing them through a series of receptacles or hoppers.

The present invention aims to improve with reference to the door or discharge to the door or dis charge of the hoppers whereby all the doors may be operated from a single point and leakage of the water prevented, thereby re ducmg the cost of operation and improv- 1112 the quality of the product, all of which I will hereinafter more fully' appear.

In the accompanying drawings wherein similar reference numerals are used to irr.

dirato corresponding parts in eachof the several vie\\s:-l*igrure l is an elevation of the complete apparatus, the doors of all the mixing hoppers being open, Fig. 2 is a bottom plan view of the storage bin, Fig. 3 is a bottom plan view of one ot the mixing hoppers, Fig". "i a vertical diametrical section of the same. Figs. 3 and (3 are detail views showing the means for locking the doors of the hoppers in their closed positions.

The working platforn i l may be supported on any convenient framework which is omitted from the drawings for the sake of clearness. The platform is provided with a suitable opening in which the uppermost mixing hopper is secured and at one side of said opening a locking rail 2 is provided, said locking rail being constructed with a ter properly with plurality of notches or open ended slots 3, the function of which will presently appear.

.lach mixing" hopper eons s of an in verted conical body 4 to the upper edge or which is secured a vertical rim 5, perforated plates 6, being secured rigidly to the outer side ot the rim. The rim of the uppermosthopper provided with lateral supports 7 adapted to rest upon the platform and thereby sipportthe hopper while links or suspending rods 8 have their hooked ends 9 engaged in the toggle plates to thereby sup port the lower hoppers. This con struction permits the several links to be rapidly detached when it is cesired to nestthe hoppers for shipu'ient or' age.

To the lower end of the h pet is secured an annular it: pro.- ed with spaced lugs 11 am paced lugs if: oiametrically opposite the same. The lugs ll con te means for attaehin a latch but ordinarily the latch will not no employed and it is therefore not shown. The lugs 12 rm hinge members through which the hinge post or oolt it; is inserted, said bolt also passing through the strap or hinge member 1 t secured to the 'under side of the door 15 which forms the closure for the hopper. The dmr 15 is a circular plate of sutlicient area to. extend over the entire lower end of the hopper and is of sullieientthickness and rigidity to sustain the weight of the material in the hopper and spuds It} on the easting 1!) guide the door into position to reg is the opening in the bottom of the hopper. A staple or loop 17 is secured rigidly on the door and is engaged by the lower end of an (operating rod 18 which extends through the hopper up to the operating platform.

The upper endof the operating rod is provided with a transverse handle 19 and all the operating rods extend up to the working platform, as shown in Fig. 1. Each rod is engaged in a notch 3 in the locking rail 2 and the handle 19 will extend across the notch and thereby hold it in its raised position.

To discharge the contents of the hopper it is necessary to merely release the upper end of the rod from the notch in ,which it is engaged whereupon the door' will drop and the contents of the hopper at once pass by gravity into the next lower hopper. By

this arrangement, a. single workman may;

open and close the doors of all the hoppers and it is unnecessary to station a workman at each hopper.

From the lowermost hopper, the material passes into a storage bin the bottom of which is normally closed by laterally slidable cut-offs 21 controlled by levers 22 pivotally mounted on the support for the bin and secured to the cut-oil's. A car or other conveyance is drawn beneath the bin and the driver or attendant on the same swings the levers to one side to permit the contents of thebin to empty into the car.

The casting 10 is formed with an annular or similar material against which is placed a steel retaining ring 2% which is secured in place by screws or bolts 2.3 inserted through the retaining ring, the packing, and the casting. The screws or bolts will be countersunk in the rin and the rin will fit flush P 21 in the casting while the packing will pro ject normally below the casting. When the door is drawn up against the hopper, the projecting portion of the packing or elastic ring will be coi'npressed so as to effectually seal the joint against the escape of water.

As the water cannot escape until the door is opened, it will penetrate the entire mass of material and as the doors are all operated by the same workman the liability of a hopper being opened prematurely is reduced to a ininin'ium and the mixing of the ingredients is consequently carried to the desired degree so that a superior uniform quality imparted to the product and the cost of operation appreciably reduced.

Having thus fully described my invention what I claim as new and desire to secure by United States Letters Patent is:

1. In a. gravity concrete mixer, the com bination of a hopper having an annular re cess in its lower edge, a downwardly opening closure for said hopper, an elastic ring seated in said recess, a retaining ring tained against said elastic ring, and means adapted to force the closure into closed position and compress said elastic ring wuerehy a water tight joint is secured.

In a gravity concrete mixer, the coin bination of a hopper having an annular recessin its lower edge, a downwardly opening closure for said hopper, an elastic ring 5 seated in said recess, and an operating rod for said closure adapted to draw the closure into closed position thereby compressing said elastic ring whereby a water tight joint recess in its inner face at its lower edge; which receives a packing ring 23 of rubber is secured.

in a gravity concrete mixer, the combination of a hopper having an annular recess in its lower edge, an elastic ring seated in said recess and projecting below the lower edge of the hopper, a retaining ring secured against. said elastic ring, a closure for the bottom of the hopper adapted to compress the projecting portion of the elastic ring, guiding spuds on the lower of the hop per, and means for operating said closure.

t. In a gravity concrete mixer, the combination of a hopper having an annular recess in its lower edge, a downwardly opening closure for said hopper, an elastic ring seated in said recess, a retaining ring retained against said elastic ring, and an op erating rod for said closure adapted to draw the closure into closed position thereby compressing said elastic ring whereby a Water tight joint is secured.

In testimony whereof I have signed my name to this specification n the presence of two subscribing witnesses PETER C. HAINS, SR. Witnesses:

E. WILLIAMS, CHAS. E. RIORDON. 

